past paper shiz

Question 1

A ball is thrown upwards.

What effect does the force of gravity have on the ball?

Answer 1

t produces a constant acceleration downwards.

Question 2

The box has a mass of 40 g when empty. When filled with a liquid, it has a total mass of 220 g. What is the density of the liquid?

Answer 2

(220 − 40)/(5×6×4) g/cm3

Question 3

Is water or mercury larger

Answer 3

water is larger

Question 4

A student warms her hands near a fire. Which waves carry most heat to her hands and are these waves electromagnetic?

Answer 4

Infra red electromagnetic waves

Question 5

what is wavelength

Answer 5

Distance between two points of the same height on wave

Question 6

Which device is designed to allow a small direct current (d.c.) to control a large direct current
(d.c.)?

Answer 6

A relay

Question 7

a beam of cathode rays entering an electric field.

In which direction is the beam deflected by the field?

Answer 7

Downwards